Updated code to be compatible with php-etl/pipeline-contracts:0.5

Author: gplanchat

composer.json

@@ -47,7 +47,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-main": "0.2.x-dev"
+            "dev-main": "0.3.x-dev"
         }
     }
 }